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[[IC2118]] (the Witch Head reflection nebula 1000 light years from Earth), is caused by the bright star Rigel in the constellation Orion. The nebula glows because it reflects light from Rigel. Dust in the nebula reflects the light.

In astronomy, a reflection nebula is a cloud of dust which reflects the light of a star or many stars. The light from the nearby stars is not hot enough to ionize the gas of the nebula to make an emission nebula. However, is enough to make the dust visible because the light reflects off of the dust.

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